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ATK 4.7L Inline 6 Baja Stroker Jeep Engine - HP88

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  • ATK NORTH AMERICA | Part Number: ATKHP88
  • Engine Configuration:L6
  • Engine Type:Long Block
  • Fitment:Universal Fit
  • Displacement:242


Produces 270 HP and 320 pound-foot torque. This is the engine combination that won the Baja 1000 for Team ATK. Other modifications may be needed (Injectors, Throttle Body, ECU, Exhaust ect.) Engine Type: AMC Straight 6 cylinder Displacement ( 242 Bore/Stroke: .040-.060 x 3.906 Crankshaft: Scat Nodular Steel Rods: OE 6.125" Pistons: Forged Dished Compression: 9.3:1 Rings: Moly Camshaft: Flat Tappet Camshaft Lift: lift .484 x .507 Camshaft Duration @.50:213x220 Cam Specs: 213/220 @50 .487in/.507ex 112LSA Cylinder Heads: Ported OE Cast Iron #686 Rocker Arms: Harland Sharp Billet Aluminum Roller Recommended Fuel: 92 Octane + Max RPM: 5300 Warranty: 1 year/12,000 miles For your engine core return, the engine core needs only to be the same type as the ATK engine supplied, complete and with no visible damage and be able to turn over 360 degrees. Core pickup is easy. Place it in the crate and call the pickup number provided with the bill of lading. We pay the freight back. We will contact you after the sale for your vehicle VIN number, cylinder block and head casting numbers. **Retail price does not include the manufacturer core charge. A sales rep will contact you when your order is received regarding the core charge and availability.



Question & Answers

13 Answered questions

I have a 2000 xj 4.0, will this motor fit? If so, does it require any modifications or is direct bolt on?

Asked by P-BO from on

P-Bo, the ATK NORTH AMERICA 4.7L Baja Stroker Jeep Engine will fit just fine. Hope this helps!

Answered by Zach O. ext 4939 from on


Asked by JOHN from OSSIPEE,N.H. on

Hello John, We do not offer a complete turn key motor. You will need to remove the bolt on parts off the old motor when installing an Atk replacement engine. If you have anymore questions feel free to ask, Thank you.

Answered by JordanC@extension4833 from OSSIPEE,N.H. on

1999 XJ automatic will I need to rebalance the torque converter to match this new stoker engine and what about the balancer in front do you have a recommended accessary pack

Asked by BD-1 from seattle wash on

Hi BD-1 I checked with ATK on the application and they told me this will not fit the 1999-2001 XJ. Thanks

Answered by LWiff ext 4804 from seattle wash on

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As the largest private label crate engine remanufacturer in North America, ATK has been around for over 80 years producing parts including high performance engines, transmissions and rear axles. When your Jeep needs an engine rebuild, an ATK remanufactured engine uses reverse engineering processes to virtually eliminate factory defects that hinder performance. One reason ATK is at the forefront of engines is their adherence to thorough cleaning and inspection techniques and their machining and magnafluxing capabilities. If staying out of the garage and out on the trail is a priority, rely on ATK to get your 4x4 up and running. Shop ATK NORTH AMERICA Now